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Comparison LabCompare 27 voice AI platforms and components across seven buying contexts, with sourced capabilities, current price captures and visible unknowns.Voice AI Price Index: prices, evidence and historyUnderstand the complete voice-agent cost stack: models, voice, transcription, telephony, subscriptions, capacity and add-ons.Know the cost before the first callEstimate monthly voice-agent costs, AI minutes, setup expenses and volume scenarios using your own transparent assumptions.AI voice agents for dentalAppointments, rescheduling and after-hours calls—with a person ready for clinical questions. Explore call flows, safe automation, integrations, tests and cost considerations.

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Cognigy vs OpenAI Realtime API

Cognigy is positioned as enterprise agent workflows and Voice Gateway for existing contact-center environments. OpenAI Realtime API is positioned as speech-to-speech API for developers implementing their own voice application. Sta

The decision in context

Cognigy is positioned as enterprise agent workflows and Voice Gateway for existing contact-center environments. OpenAI Realtime API is positioned as speech-to-speech API for developers implementing their own voice application. Start by deciding who owns the missing layers, then inspect the documented differences below.

Enterprise Platforms and Developer Frameworks are different product categories. An underlying engine or framework is not a complete substitute for a deployed agent workflow.

10 jointly documented catalog fields. This measures evidence coverage, not equivalent quality or an overall winner.

Compare for the job

Test opening hours, booking conflicts and an unanswered transfer.

2 of 4 slots
CognigyOpenAI Realtime API
Decision signals / differences first

Start where the records differ.

4 of 8 priority fields differ

Values and evidence states are compared together. Shared facts follow the differences; Unknown never means No.

Selected platforms: buyer-critical differences before detailed dimensions
Decision pointCognigyOpenAI Realtime API
Billing modelDifferent records
custom-sales-ledVerified Yes · 2026-09-28
component-stackVerified Yes · 2026-09-28
Billing unitDifferent records
UnknownUnknown after research · 2026-09-28
1 million text/audio/image tokens; transcription separately meteredVerified Yes · 2026-09-28
Bring your modelDifferent records
YesVerified Yes · 2026-09-28
UnknownUnknown after research · 2026-09-28
HIPAA pathDifferent records
YesVendor claim · 2026-09-28Cognigy.AI supplier statement
UnknownUnknown after research · 2026-09-28
Bring your telephonyShared state
YesConditional · 2026-09-28Voice Gateway
YesConditional · 2026-09-28Realtime SIP inbound
Warm transferShared state
UnknownUnknown after research · 2026-09-28
UnknownUnknown after research · 2026-09-28
Your requirements & next steps
Carried from your shortlist

Your requirements

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Ready-made / AI receptionist · Strict evidence mode

No personal requirements yet. Add criteria in Advanced Filter to prioritize this comparison.

Unknown ≠ No
Evidence, side by sideNo benchmark scores
CognigyEnterprise Platforms
OpenAI Realtime APIDeveloper Frameworks
Pricing model
Cognigy
custom-sales-ledVerified Yes · 2026-09-28

Sales-led enterprise component deployment; no public complete rate table in captured product documentation.

OpenAI Realtime API
component-stackVerified Yes · 2026-09-28

Realtime model tokens plus input transcription, tools and carrier/hosting; not GPT-Live session-minute billing.

Headline / base price
Cognigy
UnknownUnknown after research · 2026-09-28

Exact licensed components, speech/model/carrier pass-through and enterprise minimum require a quote.

OpenAI Realtime API
GPT-Realtime-2 audio input $32/M, audio output $64/M; text input $4/M, output $24/MVerified Yes · 2026-09-28

Cached audio/text and image inputs have separate rates. Rate is not per-minute.

Billing unit
Cognigy
UnknownUnknown after research · 2026-09-28

Exact licensed components, speech/model/carrier pass-through and enterprise minimum require a quote.

OpenAI Realtime API
1 million text/audio/image tokens; transcription separately meteredVerified Yes · 2026-09-28

Model scope fixed to GPT-Realtime-2, not all voice models.

Platform fee
Cognigy
UnknownUnknown after research · 2026-09-28

Exact licensed components, speech/model/carrier pass-through and enterprise minimum require a quote.

OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.

Included usage
Cognigy
UnknownUnknown after research · 2026-09-28

Enterprise product and trial documentation reviewed; no complete current commercial schedule/eligibility or bundled provider costs established. Trial Knowledge AI does not inherit contracted SLA.

OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.

Overage
Cognigy
UnknownUnknown after research · 2026-09-28

Enterprise product and trial documentation reviewed; no complete current commercial schedule/eligibility or bundled provider costs established. Trial Knowledge AI does not inherit contracted SLA.

OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.

Pass-through costs
Cognigy
Carrier and speech-provider subscription costs may applyConditional · 2026-09-28

Barge-in can increase speech subscription costs; contract determines payment route.

OpenAI Realtime API
Input transcription, tool/backend calls, carrier and application infrastructureVerified Yes · 2026-09-28

Repeated context, cache behavior and turn count affect token charges.

Free offer
Cognigy
UnknownNot researched

Not yet researched against this buyer-critical field standard.

OpenAI Realtime API
UnknownNot researched

Not yet researched against this buyer-critical field standard.

Complete cost ceiling
Cognigy
UnknownUnknown after research · 2026-09-28

Exact licensed components, speech/model/carrier pass-through and enterprise minimum require a quote.

OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient.

What remains unresolved
Cognigy
UnknownUnknown after research · 2026-09-28

Exact licensed components, speech/model/carrier pass-through and enterprise minimum require a quote.

OpenAI Realtime API
UnknownUnknown after research · 2026-09-28

Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient.

Anyone with this link can view the encoded decision criteria.

Vendor documentation establishes a claim. Public model benchmarks are separate context, not measurements of these platforms.

Open saved comparison ↗

What to verify together.

Cognigy

No public unit price was established; request itemized platform, speech, carrier and support costs.

Custom quote / current rate unresolved · V3.3 evidence review · Enterprise contract; complete public numeric schedule unavailable

Excluded / confirm: Complete cost cannot be established from this reference. Exact licensed components, speech/model/carrier pass-through and enterprise minimum require a quote. · Carrier and speech-provider subscription costs may apply

custom-sales-ledVerified Yes · 2026-09-28

Sales-led enterprise component deployment; no public complete rate table in captured product documentation.

Read the complete profile →

OpenAI Realtime API

A token rate cannot be compared directly with a bundled call-minute price.

GPT-Realtime-2 audio input $32/M, audio output $64/M; text input $4/M, output $24/M · V3.3 evidence review · GPT-Realtime-2 input audio tokens only; output/audio/text/cache have different rates; not 2.1 rate evidence

Excluded / confirm: Complete cost cannot be established from this reference. Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient. · Input transcription, tool/backend calls, carrier and application infrastructure

component-stackVerified Yes · 2026-09-28

Realtime model tokens plus input transcription, tools and carrier/hosting; not GPT-Live session-minute billing.

Read the complete profile →

The evidence overlap.

Both records have documented values for Product type, Technical setup, Pricing model, OpenAI models, MCP tools, Function / tool calling, Interruption controls, Official product documentation, Checked within 30 days, Retained price snapshot. Matching availability does not measure behavior under your call conditions.

Run the same booking, tool failure and unsuccessful human-transfer cases. Record both outcomes and billable units before signing a deployment agreement.

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Editorial index gate: noindex-cross-category. Different product layers. This pair is useful for architecture inspection, not a like-for-like purchase ranking.